seaport in N Portugal, on the Douro River: pop. 345,000
See Oporto in American Heritage Dictionary 4
(ō-pôrˈtō, ō-pōrˈ-) also Por·to or Pôr·to(pôrˈto͝o)
A city of northwest Portugal near the mouth of the Douro River north of Lisbon. Probably of pre-Roman origin, it was captured by the Moors in 716. Its wine trade was established in 1678. Population: 263,000.